Herman, J.; Marquet, R. (2007). Le Miocène du Deurganckdok à Doel. Memoirs of the Geological Survey of Belgium, 54(2007). Geological Survey: Brussel. ISBN 0378-0902. 149 pp.
Part of: Memoirs of the Geological Survey of Belgium. Geological Survey of Belgium: Bruxelles. ISSN 1373-5438, more